This International Standard specifies the requirements for a series of metal ball valves suitable for petroleum, petrochemical, natural gas plants, and related industrial applications.
It covers valves of the nominal sizes DN
-- 8; 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500
corresponding to nominal pipe sizes NPS
-- ¼; 3/8; ½; ¾; 1; 1¼; 1½; 2; 2½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20;
and applies for pressure designations
-- Class 150; 300; 600; 800 (Class 800 applies only for valves with reduced bore and with threaded and socket welding end);
-- PN 16; 25; 40.
It includes provisions for testing and inspection and for valve characteristics as follows:
-- flanged and butt-welded ends, in sizes 15 <= DN <= 500 (½ <= NPS <= 20);
-- socket welding and threaded ends, in sizes 8 <= DN <= 50 (¼ <= NPS <= 2);
-- body seat openings designated as full bore, reduced bore and double reduced bore;
-- materials.